September weather in Piedmont, CA
The average temperature in Piedmont in September is 65.9°F (57.2°F–74.6°F). Average precipitation: 0.10 inches.
September is a fall month in Piedmont, and is warmer than the annual average of 59.6°F. Daily temperatures swing about 17.4°F between overnight low and afternoon high. Expect about 1 days with precipitation. Daylight averages about 12h 14m. For travel, September is one of the best months of the year to visit.
Avg High
74.6°F
Avg Low
57.2°F
Precipitation
0.10 in
Daylight
12h 14m
September records in Piedmont
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 91.9°F (1984) | 51.1°F (1973) | 0.25 in (2000) |
| September 2 | 91.9°F (2009) | 53.1°F (2012) | 0.00 in (1971) |
| September 3 | 91.0°F (1983) | 52.0°F (1973) | 0.00 in (1971) |
| September 4 | 91.9°F (1971) | 52.0°F (1973) | 0.00 in (1971) |
| September 5 | 100.0°F (2022) | 53.1°F (1999) | 0.00 in (1971) |
| September 6 | 102.0°F (2020) | 54.0°F (1975) | 0.00 in (1971) |
| September 7 | 96.1°F (2020) | 54.0°F (1975) | 0.00 in (1971) |
| September 8 | 102.9°F (1984) | 54.0°F (1975) | 0.21 in (1985) |
| September 9 | 96.1°F (1984) | 53.1°F (1986) | 0.18 in (1985) |
| September 10 | 96.1°F (1979) | 52.0°F (1986) | 0.46 in (1978) |
| September 11 | 106.0°F (1979) | 54.0°F (1988) | 0.02 in (1976) |
| September 12 | 105.1°F (1979) | 53.1°F (1988) | 0.02 in (2009) |
| September 13 | 104.0°F (1971) | 53.1°F (1973) | 0.36 in (2009) |
| September 14 | 109.0°F (1971) | 54.0°F (1988) | 0.01 in (1997) |
| September 15 | 98.1°F (1971) | 52.0°F (1973) | 0.00 in (1971) |
| September 16 | 88.0°F (1984) | 51.1°F (2006) | 0.78 in (1989) |
| September 17 | 95.0°F (2000) | 52.0°F (1988) | 0.51 in (1989) |
| September 18 | 91.9°F (2000) | 51.1°F (2008) | 0.15 in (2022) |
| September 19 | 96.1°F (2000) | 52.0°F (1989) | 0.59 in (1977) |
| September 20 | 99.0°F (1983) | 51.1°F (2004) | 0.40 in (1973) |
| September 21 | 96.1°F (2003) | 52.0°F (2004) | 0.33 in (2013) |
| September 22 | 90.0°F (2003) | 53.1°F (1974) | 0.14 in (2007) |
| September 23 | 98.1°F (1978) | 52.0°F (1976) | 0.34 in (1986) |
| September 24 | 99.0°F (1978) | 51.1°F (2005) | 0.51 in (1986) |
| September 25 | 98.1°F (2019) | 51.1°F (2005) | 0.47 in (2014) |
| September 26 | 93.0°F (1973) | 52.0°F (1975) | 0.52 in (1972) |
| September 27 | 95.0°F (1973) | 52.0°F (1986) | 0.38 in (1972) |
| September 28 | 96.1°F (2020) | 48.0°F (1986) | 0.41 in (1976) |
| September 29 | 95.0°F (1978) | 51.1°F (1986) | 0.23 in (1983) |
| September 30 | 98.1°F (1980) | 50.0°F (2007) | 0.32 in (1983) |